LS6 Intake Vs Aftermarket
Only in a boosted set-up would the TB be a restriction, or on a 400+C.I. motor. What is the stock LS6 TB...78mm? 80? I was thinking about getting my TB ported. What is the biggest TB you fit on a LS6 intake without a lot of extensive mods? I think I've seen 85mm on them without mods correct?
Personally, I would just get the stock one ported.
Down the road I may end up with a 4xx cid LSx, but for now I am just looking to add a little more to my nice weather DD. I have already purchased some 799 heads and LS6 intake to top my stock cube LS1. I am still researching cams, and I am looking for info on the general rpm operating range of the LS6 intake.
I gained about 1.5 MPH and 2 tenths on a SI car with that LS6 intake/ported TB over a stock LS1. If you have lots of money to burn than do the Fast and TB now-you will see improvement even on a stock car but as mentioned there are better mods even when cammed. I am really curious how much I might have gained had I used a TPIS modded LS6 intake and NW TB I missed out on instead.
Does anyone have results from a stock LS6 intake and TB compared to a ported LS6 intake and TB?
I was informed by a vendor their ported LS6 intakes are tested and flow around 14cfm over the stock LS6 intake (I'll have to go back and look up a past email to be certain of the exact numbers). But if that is true, that has to be a decent hp gain, especially on a H/C motor.
But anyways, the FAST intake is a superior design to the LS6. They're both great pieces.
I was informed by a vendor their ported LS6 intakes are tested and flow around 14cfm over the stock LS6 intake (I'll have to go back and look up a past email to be certain of the exact numbers). But if that is true, that has to be a decent hp gain, especially on a H/C motor.
But anyways, the FAST intake is a superior design to the LS6. They're both great pieces.
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Verdad Gallardo Instead of porting why not pick up a used 90 or 92 setup? 350$ selling your stock stuff+money from porting would almost pay for a complete 90/90 or 92/92 setup if you were patient. Wouldn't make sense to me.
I was told the ported LS6 set-up flows almost on par with a FAST 78. That comes from a vendor that tests and sells FAST intakes as well. The ported LS6 runners flow 12.5cfm @.600 over the stock LS6 runners. That is a pretty good gain, bang-for-the-buck if you will, for only $200. And the stock TB opening is ported to 78mm over the stock 75mm.
Point being, the cost of either set-up is worth it. For a little more money you'll get a little more power (w/ FAST). Pretty much you get what you pay for.
Last edited by R6cowboy; Jun 19, 2011 at 12:24 PM.
I think the FAST intakes are worth it. But the reason I went with the LS6 intake is because I want to keep under the hood looking as stock as possible. Otherwise I would've gone with a FAST.
Good point, but the money spent on a ported LS6 set-up is still worth the cost. My experience, I'll have $600 total into my ported & polished LS6 intake and throttle body set-up. That's including purchase of the LS6 intake. For what I see a used FAST 90 or 92 set-up will run $1000-$1200, right?
I was told the ported LS6 set-up flows almost on par with a FAST 78. That comes from a vendor that tests and sells FAST intakes as well. The ported LS6 runners flow 12.5cfm @.600 over the stock LS6 runners. That is a pretty good gain, bang-for-the-buck if you will, for only $200. And the stock TB opening is ported to 78mm over the stock 75mm.
Point being, the cost of either set-up is worth it. For a little more money you'll get a little more power (w/ FAST). Pretty much you get what you pay for.
I was told the ported LS6 set-up flows almost on par with a FAST 78. That comes from a vendor that tests and sells FAST intakes as well. The ported LS6 runners flow 12.5cfm @.600 over the stock LS6 runners. That is a pretty good gain, bang-for-the-buck if you will, for only $200. And the stock TB opening is ported to 78mm over the stock 75mm.
Point being, the cost of either set-up is worth it. For a little more money you'll get a little more power (w/ FAST). Pretty much you get what you pay for.
Teching In
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I went with a ported FAST 90/90 setup on my bolt-ons car and picked up 29hp/33tq over a LS1 intake. Go with a fast and dont waste your money on anything else. bolt ons with fast 90 i put down 378hp/393tq on a dynojet i have dynosheets posted in my online albums
TECH Addict
Joined: Apr 2009
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